| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a roof floor inspection hatch capable of preventing the generation of aerodynamic noise such as whistle sound, etc. and the intrusion of rainwater when a roof floor inspection hole is closed. <P>SOLUTION: When a cover body 23 of a roof floor inspection hatch 1 closes a roof floor inspection hole 6, a space 200, which ceiling surface side is a lower surface 27 of a top plate 24 of the cover body 23 and which opening 201 is on a roof side of the building, is created between an inner surface 29 of a sidewall 25 of the cover body 23 and an outer surface 7 of a raised slab 3, and also a clearance 100 is created between the lower surface 27 of the top plate 24 of the cover body 23 and an upper end surface 9 of the raised slab 3. The clearance 100 allows an opening 5 of the roof floor inspection hole 6 to communicate with the space 200, thereby reducing aerodynamic noise caused by airflow between the outside of the cover body 23 and the roof floor inspection hole 6 when the roof floor inspection hole 6 is closed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
